the shunt generator wont be started .hehe
1. Field Flashing. 2. Resistance of the filed winding should be less than critical field resistance. 3. Speed of the motor should be greater than critical speed. 4. Interchange the field connections. 5. Check the commutator surface and brush.
An 'armature winding' is the rotor winding, and the 'field winding' is the stator winding.
Critical velocity is the speed that a falling object reaches when gravity and air resistance equalize on the object.when a liquid posses streamlined motion and its velocity is less than certain limiting velocity is called critical velocity for fluids and critical velocity for satellites can be defined as the velocity will give stable orbit, this is called the critical velocity for satellites
Imperviousness to erosion via air at lifted temperatures. In stainless steels, chromium is the most critical component for expanding the scaling resistance particulary at temperatures above 1000°
critical resistance is the maximum resistance beyond which the generator failed to exite. it can b found form the occ of the generator.
The value of resistance of shunt field winding beyond which the shunt generator fails to build up its voltage is known as " critical resistance at a given speed it is the maximum field resistance with which the shunt generator excite.
More due to the impedance levels in the generator
the shunt generator wont be started .hehe
it doesn't develop emf ..........
1. Field Flashing. 2. Resistance of the filed winding should be less than critical field resistance. 3. Speed of the motor should be greater than critical speed. 4. Interchange the field connections. 5. Check the commutator surface and brush.
Possible reasons for failure of voltage buildup... 1) No residual Magnetism, 2) Field connection may be in reverse manner, 3) Field resistance is greater than critical resistance, 4) Speed is less than Critical speed.
it is the resistance with which the generatoe just excite.
With respect to an RLC circuit, the critical resistance is the resistance which would critically dampen the circuit. This means a resistance lower than the critical resistance would create an under-damped situation, and higher than the critical resistance would create an over-damped situation. An underdamped circuit will ocillate, an overdamped circuit will decay exponentially over a long period of time. The critically damped circuit will immediately decay to zero (time dependent on the values of the circuit elements)
shunt field winding have more resistance than series field winding ************sai ganesh ************269*******
classification of critical and noncritical field in CRF
An 'armature winding' is the rotor winding, and the 'field winding' is the stator winding.